/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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 *-------------------------------------------------------------------------------
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 */

/*!\file PHY/CODING/nrPolar_tools/nr_polar_interleaving_pattern.c
 * \brief
 * \author Turker Yilmaz
 * \date 2018
 * \version 0.1
 * \company EURECOM
 * \email turker.yilmaz@eurecom.fr
 * \note
 * \warning
 */

#include "PHY/CODING/nrPolar_tools/nr_polar_defs.h"

void nr_polar_interleaving_pattern(uint16_t K, uint8_t I_IL, uint16_t *PI_k_)
{
  uint K_IL_max = 164;
  uint8_t interleaving_pattern_table[164] = {
      0,   2,   4,   7,   9,   14,  19,  20,  24,  25,  26,  28,  31,  34,  42,  45,  49,  50,  51,  53, 54, 56,  58,  59,
      61,  62,  65,  66,  67,  69,  70,  71,  72,  76,  77,  81,  82,  83,  87,  88,  89,  91,  93,  95, 98, 101, 104, 106,
      108, 110, 111, 113, 115, 118, 119, 120, 122, 123, 126, 127, 129, 132, 134, 138, 139, 140, 1,   3,  5,  8,   10,  15,
      21,  27,  29,  32,  35,  43,  46,  52,  55,  57,  60,  63,  68,  73,  78,  84,  90,  92,  94,  96, 99, 102, 105, 107,
      109, 112, 114, 116, 121, 124, 128, 130, 133, 135, 141, 6,   11,  16,  22,  30,  33,  36,  44,  47, 64, 74,  79,  85,
      97,  100, 103, 117, 125, 131, 136, 142, 12,  17,  23,  37,  48,  75,  80,  86,  137, 143, 13,  18, 38, 144, 39,  145,
      40,  146, 41,  147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163};

  if (I_IL == 0) {
    for (int k = 0; k < K; k++)
      PI_k_[k] = k;
  } else {
    for (int m = 0, k = 0; m < K_IL_max; m++) {
      if (interleaving_pattern_table[m] >= (K_IL_max - K)) {
        PI_k_[k] = interleaving_pattern_table[m] - (K_IL_max - K);
        k++;
      }
    }
  }
}
